/*
 * Copyright (c) 2015, Intel Corporation
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
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 *    this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *  * Neither the name of Intel Corporation nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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/** \file
 * \brief NFA graph reductions.
 */

#ifndef NG_REDUNDANCY_H
#define NG_REDUNDANCY_H

#include "som/som.h"

namespace ue2 {

class NGHolder;
struct CompileContext;

/** Attempt to make the NFA graph \p g smaller by performing a number of local
 * transformations. */
bool removeRedundancy(NGHolder &g, som_type som);

/** UE-524: remove edges into nodes that are dominated by cyclic nodes with
 * reachability that is a superset of all paths feeding into that edge. Returns
 * true if any edges/vertices were removed. */
bool removeCyclicDominated(NGHolder &g, som_type som);

} // namespace ue2

#endif
